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  • Best prices in the industry — without compromising on quality
  • Batch-specific certificates of analysis on every lot
  • Free shipping on Canadian orders over CA$200
  • Priced in Canadian dollars — the figure on the tile is the figure charged
  • Same-day dispatch from within Canada — 2–5 business days nationwide
Onex Peptides, Canadian research peptide supplier

Quality

A purity claim you cannot check is marketing

Every supplier in this category prints ">99% pure" on a product tile. The number only means something if it can be tied to the vial in your hand — a lot number on the label, a chromatogram produced from that lot, and a release date you can read.

What every peptide lot is held to

Identity

Mass spectrometry

Confirms the compound is the one named on the label before the lot is released. An identity failure is not a purity problem — it is a different substance.

Purity

>99% (HPLC)

Reverse-phase HPLC, reported as a chromatogram rather than a bare number, so the shape of the trace is readable and not only the integration.

Appearance

Lyophilised cake

Inspected against the expected colour and form. A discoloured or collapsed cake is a handling or moisture problem and the lot is rejected.

Traceability

Lot-level

The lot number printed on the vial matches the certificate in the box and the record held on file. One number, three places.

Specification against measurement

These are two different things and the category uses them interchangeably. A release specification is the bar a lot has to clear before it is sold — ours is >99% (HPLC). A measurement is what one particular lot actually assayed at, and it belongs to that lot and no other.

Product tiles on this site print the specification and label it as such. They never print a measured figure. A tile carrying a measured number with no lot attached would be advertising a result from a vial somebody else received, and a figure from a different fill of the same compound is exactly that.

Why batch-specific certificates matter

A representative certificate is a real document from a real assay — of a lot that is not yours. Suppliers use them because testing every batch costs money and because most buyers never check. The failure mode is quiet: the certificate is genuine, the figures are genuine, and the vial in front of you was never tested.

The check takes ten seconds. Read the lot number on the vial, read the lot number on the certificate, and confirm they are the same string. If a supplier cannot produce a certificate that matches, what they have is a specification and not a measurement.

What arrives with an order

  • The vials, lyophilised and sealed, each labelled with the compound, the fill and the lot number.
  • The certificate of analysis for that lot, with the chromatogram, the release specification and the release date.
  • Storage and reconstitution conditions for the compound — stated per compound on its product page, because they are not identical across the catalogue.

Parcels leave British Columbia, Canada and travel domestically, so a lot is in transit for two to five business days rather than an unknown number of weeks between being released and being received. For a lyophilised powder that is a quality argument as much as a logistics one.

What we do not claim

No accreditation is claimed on this page and no detection limit is quoted. The laboratory named on the certificates is named because the documents name it, and every certificate carries that laboratory’s own verification link — the claim is checkable without going through us, which is the only form of it worth making. Everything beyond that is a statement about arrangements that has to be verifiable before it is published, and a supplier implying one without stating it is doing the thing this page exists to argue against.

Each certificate also closes with the laboratory’s own sentence: results relate to the sample as received and carry no pass or fail determination. The comparison against >99% (HPLC) is ours, not theirs, and it is labelled that way everywhere it appears.